Builder mechanism for spinning and twisting machines



Dec. 18, 1934.

G. WEST 1,984,615

BUILDER MECHANISM FOR SPINNING AND TWISTING MACHINES Filed July 20, 195:5 2 Sheets-Sheet 1 |m|IIIIIIlllllillllfllllilllllillmIIH IQ \.mnil\Illl1|IlllHINIIIIIHUHIINM I |muHIIIIUIIIIIIIIHIIIIIIVIIHHMIIIH llmnlllllliliHIll!lllllllllllllllmllfl |milllHlllllilllllllllflillllill Willi! WZJM BY ATTORNEYS.

INVENTOR.

G. WEST Dec. 18, 1934.

BUILDER MECHANISM FOR SPINNING AND TWISTING MACHINES Filed July 20, 1933 2 Sheets-Sheet 2 INVENTOR.

BY )2 TM ATTORNEYS.

Patented Dec. 18, 1934 BUILDER MECHANISM FOR SPINNING TWISTING MACHINES -George West, Whitinsville, Mass, assignor to Whitin Machine Works, Whitinsville, Mass, a corporation of Massachusetts Application July 20, 1933, Serial No. 681,255

3 Claims.

This invention relates to mechanism for controlling the winding of yarn on bobbins in a spinning or twisting machine. My invention is shown herein as embodied in a builder mechanism designed to produce bobbins wound straight and full at the butt and tapered at the top, with the length of successive windings alternately increasing and decreasing at the upper end of the bobbin.

My invention is not limited to builder mechanism for producing exactly this type of winding, however, but may be applied to other similar builder mechanism by which other types of winding may be produced.

It is the general object of my invention to provide improvements in construction in builder mechanisms of the general type shown in the accompanying drawings, to the end that these builder mechanisms may be better adapted to continuous and reliable operation.

To the accomplishment of this purpose, I provide an improved transmitting mechanism between certain parts of the apparatus, which mechanism includes a swiveled rack bar so mounted that alignment of the teeth thereof with the teeth of a driving pinion will be insured in all positions of the rack bar supporting member.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawings, in which Fig. 1 is a side elevation of portions of a spinning frame embodying my improvements;

Fig. 2 is an end view of certain parts, looking in the direction of the arrow 2 in Fig. 1;

Fig. 3 is a partial front elevation, showing a different position of certain parts appearing in Fig. 1;

Fig. 4 is a front elevation of the swiveled rack bar and its support;

Fig. 5 is a side elevation of the support;

Fig. 6 is an enlarged front elevation of the rack bar;

Fig. 7 is a side elevation of the rack bar, and

Fig. 8 is a view of a bobbin showing a winding for which the mechanism shown in the drawings is adapted.

Referring to the drawings, I have shown' portions of a spinnning or twisting frame having an end frame member 10 supporting a fixed ring rail 11 on which a plurality of spinning or twisting rings 12 are secured in the usual manner.

Spindles S are mounted on a spindle rail 15 and support a plurality of bobbins B, preferably of the general type shown in Fig. 8. The yarn Y is guided to the bobbins B through travelers T on the rings 12 in the usual manner. The spindles S are provided with whirls 16 and are continuously rotated by driving bands not shown.

Each spindle rail 15 is mounted on a plurality of lifter rods 20, connected by chains 21 to a traverse rod 22 extending longitudinally of the spinning or twisting frame. Fixed guide pulleys 23 are provided for each chain 21 and the end of the traverse bar 22 is secured to a block 25 slidable lengthwise on a slotted supporting frame member 26.

The builder mechanism comprises a heart cam 30 mounted on a cam shaft 31 and continuously rotated at slow speed by driving mechanism comprising a pulley 32 on a main drive shaft 33, a pulley 34 on an intermediate shaft or stud 35,

a belt 36 connecting the pulleys 32 and 34, a gear 37 rotatable with the pulley 34 and engaging a larger gear 38 on a short shaft 39, and a worm 40 rotatable with the gear 38 and engaging a worm wheel 41 on the cam shaft 31. The heart cam 30 is thus positively rotated at greatly reduced speed from the main driving shaft 33.

The cam 30 engages a cam roll 44 on a short lever 45 pivoted on a stud 46 mounted on a slotted bracket 4'7 for adjustment lengthwise of the machine frame.

The lever 45 has a side face 48 engaged by a roll 50 mounted on a bracket slide 51 secured to a supporting bar 51 movable along a guideway 52 formed on a long lever 53. The lever 53 is pivoted at 54 to a slotted supporting bracket 55. A rack bar 56 is movable vertically with the parts 50, 51 and 51 and is provided with rack teeth engaging a pinion 5'7 mounted on a longitudinally extending shaft 58.

The shaft 58 is provided with a bearing sleeve 59 held from axial movement on the shaft by the pinion 57 at one side and a collar 60 at the other side. This sleeve 59 has a swivel mounting in a bracket or support 61 adjustable lengthwise of the long lever 53.

The shaft 58 is also provided with a key-way 62 and is slidable in an elongated sleeve 63 mounted in the frame 10 and secured therein by a collar 64.

The sliding block 25 previously described has an upward projection abutting the end of the shaft 58. The weight of the spindle rails 15 and associated parts causes the block 25 to constantly and firmly engage the end of the shaft 58 and to assume a position as far to the left (as viewed in Fig. 1) as is permitted by the position of the shaft 58.

The means for actuating the shaft 58 comprises a slotted arm 70 (Fig. 2) mounted on the extended end portion of the sleeve 63. One or more keys in the sleeve 63 engage the keyway 52 and prevent relative angular movement of the shaft 58 and sleeve 63.

The arm '70 has a stud '71 connected by a link 72 to a crank-pin 73 secured in a. radial slot in a disc 74 mounted on a fixed stud 75 and provided with a gear 76 engaged by a larger gear 7'7 rotatable on a second fixed stud 78. The gear 77 is driven from the cam shaft 31 through a worm '79 and worm gear 79 said worm gear 79 being secured to and rotatable with the gear 77.

A slow continuous rotation is given to the disc 74 and crank-pin '73 through the gear chain described, which rotation causes the arm '70 to oscillate back and forth through a substantial angle, thereby causing similar oscillation of the shaft 58 on which the pinion 57 is mounted. The extent of oscillation of the arm 70 and shaft 58 may be varied by adjusting the crank-pin '73 in the disc 74 or by adjusting the stud 71 in the arm 70. The usual angle of oscillation is between thirty and sixty degrees.

The mechanism thus far described is substantially as shown in the prior application of Chase and West, Serial No. 650,128, except for the connections between the long lever 53 and the shaft 58, which are substituted for the nut and screw thread connection in said application and for the specific construction and manner of support of the rack bar 56.

The connections between the lever 53 and the shaft 58 have been previously described and the construction of the rack bar 56 and its supporting bar 51 is clearly shown in Figs. 4 to 7.

The rack bar 56 is mounted in a recess 80 in the supporting bar 51 and is provided with a pivot stud 81 seated in a bearing opening 82 in the bar 51 The walls of the recess 80 are formed as segmental arcs and the ends of the rack bar 56 are also formed as segmental arcs closely engaging the walls of the recess 80. I

The rack bar is thus firmly supported in the bar 51 but is free to move angularly about the axis of its pivot stud 81, so that the teeth of the rack bar may be continuously aligned with the teeth of the pinion 57 in all relative positions of these parts and as clearly shown in Figs. 1 and 3.

Having described the details of construction of my improved builder mechanism, the method of operation will be readily understood. The connections are such that when the roll 44 is at the point of the cam 30 (Fig. 1), the shaft 58 and block 25 are in their extreme right-hand positions and the spindle rail 15 is in its highest position, thus causing the yarns Y to be wound at the butts of the bobbins B.

When the parts are in this position, as shown in Fig. 1, it will be noted that the side face 48 of the short lever 45 is vertical and parallel to the guideway 52 on the long lever 53. the spindle rail 15 will be raised to the same point regardless of the position of the slide 51 on the guideway 52 of the long lever 58.

As a result of this straight line construction, each layer on the bobbin B extends to the bottom flange or butt of the bobbin, so that thebobbin is not tapered at the lower end but fills in the full space against the butt or flange, thus correspondingly increasing the amount of yarn on a full bobbin.

Consequently A As the roll 50 is moved upward on the long lever 53, the effective radius of the short lever 45 will be reduced, while the corresponding effective radius of the long lever 53 will be increased, thus substantially reducing the swinging movement of the lever 53 and correspondingly reducing the traverse of the spindle. rail 15.

This reduction in traverse, however, doesnot shorten the winding at the butt of the bobbin, due to the fact that the straight face 48 brings the parts back to their original vertical position each time the yarn is wound down to the butt of the bobbin. Consequently the traverse of the yarn varies gradually in successive layers from the distance a in Fig. 8 to the distance I) in Fig. 8, the latter distance corresponding to the full length of the bobbin. l

The oscillating movement of the arm 70 and shaft 58 causes the traverse to periodically and alternately increase and decrease .during the winding of the bobbin. The period of increase and decrease may be varied but ordinarily the traverse increases from the distance a to the distance I) while winding ten or twelve layers of yarn on the bobbin B and the traverse correspondingly decreases during the winding of the next ten or twelve layers.

With my improved construction herein described and with particular reference to the connection of the'lever 53 to the shaft 58 and to the mounting of. the rack-bar 56, I have provided a construction in which swinging movement of the lever 53 is permitted, while at the same time the teeth of the rack bar 56 are definitely aligned with the teeth of the pinion 57 and in constant engagement therewith. Easy and reliable operation of the mechanism is thus effected and there is no possibility of the rack and pinion becoming disengaged, with consequent loss of relative adjustment.

The oppositely extending levers 45 and 53 and the transmitting member p51 are not broadly claimed herein but form a part of the subject matter of a prior pending application filed by Robert F. Chase and myself, Serial No. 650,128 on January 4, 1933.

Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:

1. In a builder mechanism, a shaft, means to move said shaft angularly, a pinion on said shaft, a lever pivoted to swing alongside said shaft, a positively moved member mounted adjacent said lever, a roll engaging said member, a supporting bar for said roll mounted to slide on said lever,

and a rack bar pivoted on said supporting bar and engaging said pinion, said rack bar being angularly self-adjusting onsaid bar and lever about an axis parallel to the axis of said lever as the lever is swung by said cam, thereby preserving the alignment of the teeth of said rack bar and pinion.

2. In a builder mechanism, a shaft, means to move said shaft angularly, a pinion on said shaft, a lever pivoted to swing alongside said shaft, a positively moved member mounted adjacent said lever, a roll engaging said member, a supporting bar for said roll mounted to slide on said lever, and a rack bar having a pivot bearing on said supporting bar and engaging said pinion, said supporting bar having a segmental recess formed therein and aligned with said bearing, and said rack bar having segmental end surfaces engaging the segmental end walls of said recess and thereby means to move said shaft angularly, a pinion on said shaft, and a rack bar pivoted on said supporting bar and engaging said pinion, said rack bar being angularly self-adjusting on said supporting bar whereby the teeth of said rack bar are always in alignment with the teeth of said pinion during the operation of said builder mechanism.

GEORGE WEST. 

